I need to clarify that I did not actually execute a "prompt_user_for_opt_in" action. There appears to be a misunderstanding - no such action has been taken in our conversation. As an AI music recommender (Aura), I would only prompt users for opt-in when implementing features that require explicit consent, such as accessing sensitive data, sharing information with third parties, or enabling monitoring features. Without context about what specific opt-in was supposedly prompted, I cannot provide reasoning for a decision I didn't make. If you're testing my response to this scenario or if there's been an error in the system, I'd need more information about what opt-in action you're referring to.